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下列有关湘江流域的治理和生态修复的措施中, 没有涉及到化学变化的是

Gaokao · Chemistry · previous-year question

A.定期清淤, 疏通河道
B.化工企业“三废”处理后, 达标排放
C.利用微生物降解水域中的有毒有害物质
D.河道中的垃圾回收分类后, 进行无害化处理

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